نتایج جستجو برای: apparent diffusion coefficient
تعداد نتایج: 421418 فیلتر نتایج به سال:
Surface-active molecules supplied from a particle fixed at the water surface create a spatial gradient of the molecule concentration, resulting in Marangoni convection. Convective flow transports the molecules far from the particle, enhancing diffusion. We analytically derive the effective diffusion coefficient associated with the Marangoni convection rolls. The resulting estimated effective di...
Surface-active molecules supplied from a particle fixed at the water surface create a spatial gradient of the molecule concentration, resulting in Marangoni convection. Convective flow transports the molecules far from the particle, enhancing diffusion. We analytically derive the effective diffusion coefficient associated with the Marangoni convection rolls. The resulting estimated effective di...
1) Kwee TC, et al. JMRI 2008;28:1141-1148 2) Hollingsworth KG, et al. NMR Biomed 2006;19:231-235 3) Rosenkrantz A, et. al. Proc. ISMRM;2009;17:2065 4) Sadek AG et al. JMRI 1996;6(1):90-3. 5) LeBihan D, Radiology 1988;168:497-505, 1988 6) Haber E, et al. Lecture Notes in Comp. Sci. 2005:561-572 Figure 2: Relative changes in the diffusion components after a liquid meal. Notice perfusion fraction...
BACKGROUND AND PURPOSE Patients with nonlesional temporal lobe epilepsy have long been known to have abnormalities of memory. Recently, these patients have been shown to have increased diffusivity in the hippocampus. We hypothesized that in these patients, a negative correlation would exist between diffusivity measures of the mesial temporal lobe and performance on neuropsychological tests. M...
It is well known that the electric resistivity of concrete is one of the useful durability indicators for chloride induced deterioration of concrete structures. In this study, the influence of air temperature and relative water content ratio in concrete on some measuring results of the electric resistivity was investigated by using the concrete specimens which were exposed in tidal zone. In add...
BACKGROUND Angiomyolipoma is a unique mesenchymal neoplasm composed of blood vessels as well as smooth muscle and adipose cells. The liver is a less common site of origin, and hepatic angiomyolipoma is often an incidental finding on diagnostic imaging or is identified on evaluation of nonspecific symptoms. CASE PRESENTATION We experienced four patients who were diagnosed histologically with h...
BACKGROUND AND PURPOSE Neonatal encephalopathy in human babies is a serious condition associated with permanent neurological deficits. Diffusion-weighted MRI (DWI) is increasingly used for early diagnosis of brain injury in human babies. The relationship between the presence of DWI abnormalities and cellular injury, including apoptosis, during the neonatal period are not well understood. We ask...
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